lukaszthegreat: daleks are masters of time second only to time lords.
although borg can travel through time it is very difficult for them and they have limited ability to actually manipulate the time.
Daleks would wipe borg out of reality with simple time travel and borg cannot defend or assimilate that.
then again. if they do get on dalek ship and manage to assimilate their time travel technology it won't as easy for daleks. yet borg assimilation technology is not perfect. Something completely unknown to them is incapable of assimilation unless they put a lot of effort (read: time) into it. Even with dalek assimilated ship I would bet that they would not be able to use Daleks technology to full extent for quite long period of time.
The Daleks wouldn't let the Borg assimilate their time travel technology if there was a war between the two.
But there would be no war. The second the Daleks and the Borg encounter each other, the Daleks would go back in time, when the Borg were flawed and weak, and then exterminate them. Game over. The Borg would only be able to stand up against the Daleks if the doctor helps them but the doctor would never help the Borg.